Refrigerator

ABSTRACT

A refrigerator comprises: an opening disposed at one side of a door; an ice bank disposed on a rear surface of the door, and configured to be drawn out through the opening, for storing ice pieces; a guide unit for guiding the ice bank to be drawn out; and a volume control unit for changing a volume of the ice bank step by step. A volume of the ice bank is varied according to users necessity. This solves a users inconvenience to make ice pieces a plurality of times, for example, in summer when a large amount of ice pieces are required.

TECHNICAL FIELD

The present invention relates to a refrigerator, and more particularly, to an ice bank for a refrigerator capable of storing ice pieces therein.

BACKGROUND ART

Generally, a refrigerator serves to freshly store food items for a long time in a frozen state or in a cooled state.

The refrigerator is provided with a refrigerator body divided into a freezing chamber and a refrigerating chamber. The refrigerator body is provided with a freezing chamber door and a refrigerating chamber door through which the freezing chamber and the refrigerating chamber are opened or closed. The freezing chamber door and the refrigerating chamber door are respectively installed at one side of the refrigerator body, such that one ends thereof are rotatable in back and forth directions of the refrigerator body centering around another ends thereof.

At each one side of the freezing chamber door and the refrigerating chamber door, provided are supplementary storage chambers (hereinafter, will be referred to as home bars) for storing and drawing out food items without opening the freezing chamber door or the refrigerating chamber door.

The home bar is composed of a home bar housing disposed on a rear surface of the freezing chamber door or the refrigerating chamber door with a storage space, and a home bar door for opening and closing the storage space.

The home bar door serves to open or close an opening formed as a part of the freezing chamber door or the refrigerating chamber door corresponding to the home bar housing is cut out. The home bar door is installed such that an upper end thereof is rotatable in up and down directions centering around a lower end thereof.

The freezing chamber is provided with an ice-making device for making ice pieces. And, the freezing chamber may be also provided with an ice bank for storing ice pieces made by the ice-making device. However, the conventional ice bank has the following problems.

Firstly, in order to draw out the ice bank for storing ice pieces made by the ice-making device, the freezing chamber has to be opened by rotating the freezing chamber door. This may cause a difficulty in drawing out the ice bank.

Secondly, once the freezing chamber is opened in order to draw out the ice bank, cool air inside the freezing chamber is leaked out. As cool air inside the freezing chamber is unnecessarily leaked out, power consumption of the refrigerator is increased.

Thirdly, since the ice bank is accommodated in the freezing chamber, ice pieces in the ice bank may be soaked with odor of other food items stored in the freezing chamber.

Fourthly, since the ice bank is provided in the refrigerating chamber with a limited volume, the ice-making device has to make ice pieces a plurality of times when a large amount of ice pieces are required in summer, for example.

DISCLOSURE OF INVENTION Technical Problem

Therefore, it is an object of the present invention to provide a refrigerator capable of easily drawing out ice pieces, and controlling an amount of ice pieces to be stored according to a users necessity.

Technical Solution

To achieve these and other advantages and in accordance with the purpose of the present invention, as embodied and broadly described herein, there is provided a refrigerator, comprising: an opening disposed at one side of a door; an ice bank disposed on a rear surface of the door, and configured to be drawn out through the opening, for storing ice pieces; a guide unit for guiding the ice bank to be drawn out; and a volume control unit for changing a volume of the ice bank step by step.

The ice bank comprises a body portion formed in a box shape having opened upper and lower surfaces; and a volume expansion container inserted into the body portion so as to be vertically moveable along an inner surface of the body portion, and forming an ice storage space having an opened upper surface.

The volume control unit comprises volume control grooves formed, in a volume control direction of the ice bank, at one of inner side surfaces of the body portion and outer side surfaces of the volume expansion container; volume control protrusions formed at another of the inner side surfaces of the body portion and the outer side surfaces of the volume expansion container; and a locking unit for restricting a relative motion of the volume control grooves with respect to the volume control protrusions step by step.

The locking unit comprises locking grooves formed at one of the volume control grooves and the volume control protrusions in a volume control direction of the ice bank; and locking protrusions locked by the locking grooves step by step.

The guide unit comprises a first guide portion fixed in the opening, for guiding the ice bank to downward slantly move toward the opening; and a second guide portion configured to be introduced into or drawn out of the opening under guide of the first guide portion, for mounting the ice bank in a drawing manner.

Advantageous Effects

The refrigerator according to the present invention has the following advantages.

A volume of the ice bank is varied according to a users necessity. This may solve a users inconvenience to make ice pieces a plurality of times, for example, in summer when a large amount of ice pieces are required.

Also, ice pieces stored in the ice bank are take out through the home bar. This may enable the ice bank to be drawn out of the refrigerator in a state that the door is not opened. Accordingly, a user can easily take ice pieces out of the refrigerator.

Furthermore, the ice bank is drawn out of the refrigerator through the home bar by downward slantly moving. This may prevent food items stored in the home bar from being drawn out with interfering with the ice bank, or prevent the ice bank from being drawn out with interfering with ice pieces stored therein.

Futhermore, the ice bank is installed at a predetermined space on a rear surface of the freezing chamber door. This may prevent the ice pieces stored in the ice bank from being soaked with odor of food items stored in the ice storage space of the refrigerator. Accordingly, a user may use the ice pieces in a sanitary and comfortable manner.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a view showing appearance of a refrigerator according to a first embodiment of the present invention;

FIG. 2 is a view showing inside of the refrigerator according to a first embodiment of the present invention;

FIG. 3 is a sectional view taken along line I-I in FIG. 1;

FIG. 4 is a perspective view showing a mounted state of an ice bank of FIG. 3;

FIG. 5 is a perspective view showing the ice bank of FIG. 4 and a second guide portion;

FIG. 6 is an exploded perspective view showing the ice bank and the second guide portion of FIG. 5;

FIGS. 7 to 9 are views showing processes for drawing the ice bank out, and controlling a volume of the ice bank according to the first embodiment of the present invention

FIG. 10 is an exploded perspective view showing an ice bank and a second guide portion according to a second embodiment of the present invention;

FIG. 11 is an exploded perspective view showing an ice bank and a second guide portion according to a third embodiment of the present invention; and

FIG. 12 is an exploded perspective view showing an ice bank and a second guide portion according to a fourth embodiment of the present invention.

BEST MODE FOR CARRYING OUT THE INVENTION

Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings.

Hereinafter, a refrigerator according to a first embodiment of the present invention will be explained in more detail.

FIG. 1 is a view showing appearance of a refrigerator according to a first embodiment of the present invention, and FIG. 2 is a view showing inside of the refrigerator according to a first embodiment of the present invention.

Referring to FIGS. 1 and 2, the refrigerator body 10 is provided with a freezing chamber 11 and a refrigerating chamber 13 therein. The freezing chamber 11 and the refrigerating chamber 13 are disposed at left and right sides of the refrigerator body 10, respectively. A freezing chamber door 11 a and a refrigerating chamber door 13 a are installed at the refrigerator body 10, such that one ends thereof are rotatable in back and forth directions centering around anther ends thereof. The freezing chamber door 11 a and the refrigerating chamber door 13 a serve to open or close the freezing chamber 11 and the refrigerating chamber 13, respectively.

Supporting side walls 11 b and 13 b are provided at two ends on rear surfaces of the freezing chamber door 11 a and the refrigerating chamber door 13 a.

The supporting side walls 11 b and 13 b are formed as parts of door liners that form appearance of the rear surfaces of the freezing chamber door 11 a and the refrigerating chamber door 13 a are backward protruding by a predetermined height.

A plurality of fixing protrusions (not shown) are provided on surfaces of the supporting side walls 11 b and 13 b facing each other.

A plurality of door baskets 14 are provided on rear surfaces of the freezing chamber door 11 a and the refrigerating chamber door 13 a between the supporting side walls 11 b and 13 b.

Accommodation spaces for accommodating food items are formed in the door baskets 14.

The door baskets 14 are detachably mounted to the rear surfaces of the freezing chamber door 11 a and the refrigerating chamber door 13 a.

Home bars 15 and 17 are provided at the freezing chamber door 11 a and the refrigerating chamber door 13 a, respectively. The home bars 15 and 17 serve to draw out food items such as beverage, from the refrigerator, without opening the refrigerating chamber door 13 a and the freezing chamber door 11 a. The home bars 15 and 17 are composed of home bar housings 15 a and 17 a, and home bar doors 15 b and 17 b, respectively.

The home bar housings 15 a and 17 a are formed to have polygonal shapes that upper surfaces thereof, and rear surfaces adhered to the rear surface of the freezing chamber door 11 a or the refrigerating chamber door 13 a are opened. The home bar housings 15 a and 17 a are provided on the rear surface of the freezing chamber door 11 a and the refrigerating chamber door 13 a between the supporting side walls 11 b and 13 b. The home bar housings 15 a and 17 a are provided with storage spaces 15 s and 17 s for storing beverage, etc. therein.

As parts of the freezing chamber door 11 a and the refrigerating chamber door 13 a are cut out, openings 15 c and 17 c are formed. Here, the opening 15 c of the freezing chamber door 11 a is communicated with the storage space 15 s of the home bar housing 15 a. Through the opening 15 c, food items are received into or drawn out of the storage space 15 s of the home bar housing 15 a, or an ice bank 100 (refer to FIG. 3) installed at the storage space 15 s of the home bar housing 15 a is drawn out.

The opening 17 c of the refrigerating chamber door 13 a is communicated with the storage space 17 s of the home bar housing 17 a. Through the opening 17 c, food items are received into or drawn out of the storage space 17 s of the home bar housing 17 a.

The home bar doors 15 b and 17 b are installed at front surfaces of the freezing chamber door 11 a and the refrigerating chamber door 13 a, such that upper ends thereof are rotatable in up and down directions centering around lower ends thereof. The home bar doors 15 b and 17 b serve to open or close the openings 15 c and 17 c, respectively.

The storage space 15 s of the home bar housing 15 a is opened or closed by the home bar door 15 b of the freezing chamber door 11 a.

An ice-making device 22 for making ice pieces may be provided above the home bar housing 15 a on the rear surface of the freezing chamber door 11 a.

A water box 21 for storing water to be supplied to the ice-making device 22 may be mounted above the ice-making device 22.

Here, ice pieces made by the ice-making device 22 are transferred to the home bar housing 15 a, and stored in the ice bank 100 (refer to FIG. 3) installed at the storage space 15 s of the home bar housing 15 a.

When the ice pieces made by the ice-making device 22 are to be transferred to the ice bank 100, the positions of the ice-making device 22 and the water box 21 may be changed.

Hereinafter, the ice bank 100 will be explained in more detail.

FIG. 3 is a sectional view taken along line I-I in FIG. 1, FIG. 4 is a perspective view showing a mounted state of an ice bank of FIG. 3, and FIG. 5 is a perspective view showing the ice bank of FIG. 4 and a second guide portion.

Referring to FIGS. 3 to 5, the ice bank 100 is installed at the storage space 15 s of the home bar housing 15 a, so as to be drawn out of the storage space 15 s of the home bar housing 15 a through the opening 15 c. The ice bank 100 comprises a body portion 110 formed in a hexahedron shape having opened upper and lower surfaces; and a volume expansion container 120 inserted into the body portion 110 so as to be vertically moveable along an inner surface of the body portion 110, and forming an ice storage space 100 s having an opened upper surface.

Preferably, one surface of the ice bank 100 is formed of a transparent or a semi-transparent material such that ice pieces stored in the ice storage space 100 s can be recognized from outside.

A handgrip 101 may be provided at the ice bank 100 between a front surface of the body portion 110 and a front surface of the volume expansion container 120. The handgrip 101 may be formed to be concaved from a lower end of the front surface of the volume expansion container 120 toward a rear surface of the volume expansion container 120 by a predetermined height. Hereinafter, it is assumed that the front surface of the ice bank 100 indicates one surface of the ice bank 100 viewed from a front surface of the freezing chamber door 11 a, i.e., one surface of the ice bank 100 viewed when the storage space 15 s of the home bar housing 15 a is opened by the home bar door 15 b.

The ice bank 100 is installed at the storage space 15 s of the home bar housing 15 a by a guide unit.

The guide unit includes a first guide portion 140 fixed in the opening 15 c for guiding the ice bank 100 to downward slantly move toward the opening 15 c; and a second guide portion 150 drawn out of the opening 15 c under guide of the first guide portion 140 for mounting the ice bank 100 in a drawing manner.

A process for coupling the first guide portion 140 and the second guide portion 150 with each other will be explained in more detail.

The first guide portion 140 guides the second guide portion 150 having the ice bank 100 mounted thereto to downward slantly move toward the opening 15 c, the opened front surface of the first guide portion 140.

The first guide portion 140 prevents ice pieces stored in the ice storage space 100 s of the ice bank 100 from being locked by the rear surface of the freezing chamber door 11 a adjacent to the opening 15 c, in the process that the ice bank 100 and the second guide portion 150 are drawn out of the storage space 15 s of the home bar housing 15 a.

In order to guide the ice bank 100 and the second guide portion 150 to downward slantly move toward the opening 15 c, one pair of guide slots 141 are provided at both side surfaces of the first guide portion 140.

One pair of guide protrusions 151 are protruding from both side surfaces of the second guide portion 150.

The guide protrusions 151 serve to guide the second guide portion 150 to be drawn out of the storage space 15 s of the home bar housing 15 a through the opening 15 c in a state that the ice bank 100 is mounted to the second guide portion 150.

The guide protrusions 151 perform a sliding motion along the guide slots 141 in an inserted state into the guide slots 141 of the first guide portion 140.

The guide protrusions 151 are composed of a first guide protrusion 152 and a second guide protrusion 153. The first guide protrusion 152 is protruding from upper middle portions of both sides of the second guide portion 150, respectively.

The second guide protrusion 153 is protruding from rear middle portions of both sides of the second guide portion 150, respectively, with a lower height than the first guide protrusion 152. More concretely, the first guide protrusion 152 and the second guide protrusion 153 are spacing from each other by a predetermined distance in a direction that the ice bank 100 and the second guide portion 150 are drawn out of the storage space 15 s of the home bar housing 15 a through the opening 15 c.

The reason is in order to allow the ice bank 100 and the second guide portion 150 to maintain a horizontal state when accommodated in the storage space 15 s of the home bar housing 15 a.

The first guide portion 140 serves to guide the second guide portion 150 drawn out of the storage space 15 s of the home bar housing 15 a in a state that the ice bank 100 is mounted to the second guide portion 150.

The first guide portion 140 is formed in a hexahedron shape having opened front, rear, and lower surfaces. The second guide portion 150 is installed in the first guide portion 40 so as to be drawn out in a front direction.

An ice transfer opening 144 is provided on an upper surface of the first guide portion 140. The ice transfer opening 144 serves as a passage through which ice pieces made by the ice-making device 22 are supplied to the ice storage space 100 s of the ice bank 100. The ice transfer opening 144 is formed as an upper surface of the first guide portion 140 is opened. The ice transfer opening 144 is formed in a rectangular shape having a size equal to or less than an opened upper portion of the ice bank 100, i.e., an inlet of the ice storage space 100 s.

An ice transfer guide portion 145 is provided on an upper surface of the first guide portion 140 corresponding to the edge of the ice transfer opening 144. The ice transfer guide portion 145 is formed in a hopper shape that two side surfaces thereof are downward slanted toward the ice transfer opening 144. The ice transfer guide portion 145 serves to guide ice pieces made by the ice-making device 22 so as to be supplied to the ice storage space 100 s of the ice bank 100 through the ice transfer opening 144.

Fixing grooves 147 are formed on both side surfaces of the first guide portion 140. The fixing grooves 147 serve to fix the first guide portion 140. To the fixing groove, inserted is a fixing protrusion (not shown) disposed at the supporting side wall 11 b of the freezing chamber door 11 a, and protruding to the storage space 15 s of the home bar housing 15 a.

The guide slots 141 are composed of a first guide slot 142 along which the first guide protrusion 152 inserted therein perform a sliding motion, and a second guide slot 143 along which the second guide protrusion 153 inserted therein perform a sliding motion.

The first guide slot 142 is composed of a first horizontal section 142 a, an inclined section 142 b, and a second horizontal section 142 c.

The first horizontal section 142 a is horizontally extending by a predetermined length, from upper middle portions of both side surfaces of the first guide portion 140, respectively, toward a direction that the second guide portion 150 having the ice bank 100 mounted thereto is drawn out, i.e., toward front ends of both side surfaces of the first guide portion 140.

The inclined section 142 b is downward slantly extending by a predetermined length, from a front end of the first horizontal section 142 a, to a direction that the second guide portion 150 having the ice bank 100 mounted thereto is drawn out.

The second horizontal section 142 c is horizontally extending by a predetermined length, from a front end of the inclined section 142 b, to a direction that the second guide portion 150 having the ice bank 100 mounted thereto is drawn out. A front end of the second horizontal section 142 c is respectively located at middle portions of front ends of both side surfaces of the first guide portion 140.

The second guide slot 143 is composed of a first horizontal section 143 a, an inclined section 143 b, and a second horizontal section 143 c.

The first horizontal section 143 a is horizontally extending by a predetermined length, from rear middle portions of both side surfaces of the first guide portion 140, respectively, toward a direction that the second guide portion 150 having the ice bank 100 mounted thereto is drawn out, i.e., toward front ends of both side surfaces of the first guide portion 140.

The inclined section 143 b is downward slantly extending by a predetermined length, from a front end of the first horizontal section 143 a, to a direction that the second guide portion 150 having the ice bank 100 mounted thereto is drawn out.

The second horizontal section 143 c is horizontally extending by a predetermined length, from a front end of the inclined section 143 b, to a direction that the second guide portion 150 having the ice bank 100 mounted thereto is drawn out. A front end of the second horizontal section 143 c is located at lower front ends of both side surfaces of the first guide portion 140, respectively.

Accordingly, when the second guide portion 150 having the ice bank 100 mounted thereto is located in the first guide portion 140, i.e., when the second guide portion 150 is accommodated in the storage space 15 s of the home bar housing 15 a, the first guide protrusion 152 and the second guide protrusion 153 are located at a rear end of the first horizontal section 142 a of the first guide slot 142, and a rear end of the first horizontal section 143 a of the second guide slot 143, respectively.

Here, the ice bank 100 and the second guide portion 150 in a horizontal state with respect to each other are disposed to be adjacent to the ice transfer opening 144 of the first guide portion 140 therebelow, and to an upper end of the opening 15 c.

Then, once the second guide portion 150 having the ice bank 100 mounted thereto is moved towards the opening 15 c, the first guide protrusion 152 and the second guide protrusion 153 slide along the inclined section 142 b of the first guide slot 142 and the inclined section 143 b of the second guide slot 143, respectively.

Accordingly, the second guide portion 150 is downward slantly moved toward the opening 15 c. Here, upper surfaces of the ice bank 100 and the second guide portion 150 are downward spacing, by a predetermined distance, from the upper end of the ice transfer opening 144 of the first guide portion 140 and the opening 15 c.

When the second guide portion 150 having the ice bank 100 mounted thereto continues to move toward the opening 15 c, the first guide protrusion 152 and the second guide protrusion 153 slide along the second horizontal section 142 c of the first guide slot 142, and the second horizontal section 143 c of the second guide slot 143.

Once the first guide protrusion 152 and the second guide protrusion 153 are positioned on a front end of the second horizontal section 142 c of the first guide slot 142, and on a front end of the second horizontal section 143 c of the second guide slot 143, respectively, front ends of the second guide portion 150 and the ice bank 100 mounted to the second guide portion 150 are partially drawn out of the storage space 15 s of the home bar housing 15 a through the opening 15 c.

In the present invention, the ice bank 100 mounted to the second guide portion 150 is guided by the first guide portion 140.

However, it may be configured that the ice bank 100 is directly guided by the first guide portion 140 without being mounted to the second guide portion 150.

In this case, in order to draw the ice bank 100 out of the storage space 15 s of the home bar housing 15 a, front ends of the guide slots 141 of the first guide portion 140, i.e., the second horizontal sections 142 c and 143 c are formed to be outwardly opened through front ends of both side surfaces of the first guide portion 140.

A process for coupling the second guide portion 150 and the ice bank 100 will be explained in more detail with reference to FIG. 5.

Referring to FIG. 5, the ice bank 100 comprises a body portion 110 formed in a box shape having opened upper and lower surfaces; and a volume expansion container 120 inserted into the body portion 110 so as to be vertically moveable along an inner surface of the body portion 110, and forming an ice storage space 100 s having an opened upper surface.

The second guide portion 150 is formed in a hexahedron shape of which upper, lower, and front surfaces are opened in correspondence to the body portion 110.

The second guide portion 150 having the ice bank 100 mounted thereto is drawn out of the storage space 15 s of the home bar housing 15 a, through the opening 15 c under guide of the first guide portion 140. And, the ice bank 100 is drawn out of the storage space 15 s of the home bar housing 15 a, through the opening 15 c under guide of the second guide portion 150.

Locking ribs 115 are provided on a front surface of the ice bank 100. And, interworking protrusions 113 are provided at upper rear portions of both side surfaces of the ice bank 100.

Supporting portions 155 for supporting the ice bank 100 are extending from lower ends of both side surfaces of the second guide portion 150 in a thickness direction of the body portion 110. Interworking ribs 154 are extending from upper front ends of both side surfaces of the second guide portion 150, by a predetermined length, so as to face each other in a thickness direction of the body portion 110.

The locking ribs 115 are downward extending from lower front ends of the ice bank 100 by a predetermined length, and are extending in right and left directions of the front surface of the ice bank 100.

The interworking protrusions 113 are upward protruding, by a predetermined height, from upper rear ends of both side surfaces of the ice bank 100.

The locking ribs 115 and the interworking protrusions 113 serve to move the second guide portion 150 by interworking with the ice bank 100 that moves in a direction to be drawn out of the storage space 15 s of the home bar housing 15 a through the opening 15 c.

For this, the locking ribs 115 and the interworking protrusions 113 are adhered to front ends of both side surfaces of the second guide portion 150, and rear ends of the interworking ribs 154 of the second guide portion 150, respectively.

Inclined portions 111 are provided at lower rear ends of both side surfaces of the body portion 110.

The inclined portions 111 are downward slanted toward a direction that the ice bank 100 is drawn out of the storage space 15 s of the home bar housing 15 a through the opening 15 c. The inclined portions 111 serve to detach the ice bank 100 having been drawn out of the storage space 15 s of the home bar housing 15 a through the opening 15 c, from the second guide portion 150, by upward slantly moving the ice bank 100 with a mounted state to the second guide portion 150.

Once the ice bank 100 is moved in a direction to be accommodated in the storage space 15 s of the home bar housing 15 a, the locking ribs 115 push a front end of a bottom surface of the second guide portion 150. This allows the second guide portion 150 to be accommodated in the ice bank 100 by interworking with the ice bank 100.

Then, when the ice bank 100 is moved in a direction to be drawn out of the storage space 15 s of the home bar housing 15 a through the opening 15 c, the interworking protrusions 113 are adhered to rear ends of the interworking ribs 154 to push the interworking ribs 154. This allows the second guide portion 150 to be drawn out of the ice bank 100 by interworking with the ice bank 100.

In the present invention, when the ice bank 100 is moved in a direction to be accommodated in the storage space 15 s of the home bar housing 15 a, the second guide portion 150 interworks with the ice bank 100 by the locking ribs 115, and is accommodated in the ice bank 100 under guide of the first guide portion 140.

It may be also configured that when the ice bank 100 is moved in a direction to be accommodated in the storage space 15 s of the home bar housing 15 a, the second guide portion 150 interworks with the ice bank 100 as a rear surface thereof is pushed by a rear surface of the ice bank 100.

Hereinafter, will be explained a volume control unit 130 for changing a volume of the ice bank 100 step by step.

FIG. 6 is an exploded perspective view showing the ice bank and the second guide portion of FIG. 5.

Referring to FIG. 6, the volume control unit 130 controls a volume of the ice bank 100 by restricting a relative motion of the volume expansion container 120 with respect to the body portion 110 step by step.

The volume control unit 130 includes volume control grooves 131 formed at one of inner side surfaces of the body portion 110 and outer side surfaces of the volume expansion container 120; volume control protrusions 132 formed at another of the inner side surfaces of the body portion 110 and the outer side surfaces of the volume expansion container 120; and a locking unit 133 and 134 for restricting a relative motion of the volume control grooves 131 and the volume control protrusions 132 step by step.

Referring to FIG. 6, the volume control grooves 131 are formed at the volume expansion container 120, whereas the volume control protrusions 132 are formed at the body portion 110. However, the positions of the volume control grooves 131 and the volume control protrusions 132 may be interchanged to each other.

The volume control grooves 131 are formed at outer side surfaces of the volume expansion container 120 in a consecutive manner from an upper end to a lower end of the volume expansion container 120. That is, the volume control grooves 131 are formed in a volume control direction of the ice bank 100.

The volume control grooves 131 may be formed by partially reducing a thickness of both side surfaces of the volume expansion container 120. However, in order to prevent lowering of a strength of the ice bank 100 stored in a lower temperature, it is preferable to inwardly curve parts of both side surfaces of the volume expansion container 120.

Preferably, the volume control grooves 131 are formed such that upper ends thereof are closed. The reason is in order to prevent separation of the body portion 110 from the volume expansion container 120, occurring as the volume control protrusions 132 moving along the volume control grooves 131 are detached from an upper end of the volume expansion container 120 when a volume of the ice bank 100 is to be maximized.

The volume control protrusions 132 are formed at the inner side surfaces of the body portion 110 in correspondence to the volume control grooves 131.

In order to maximize a volume of the ice bank 100, the volume control protrusions 132 are preferably formed at lower ends of the inner side surfaces of the body portion 110.

The locking unit includes locking grooves 133 formed at one of the volume control grooves 131 and the volume control protrusions 132 in a volume control direction of the ice bank 100, and locking protrusions 134 formed at another of the volume control grooves 131 and the volume control protrusions 132 and locked by the locking grooves 133 step by step.

Referring to FIG. 6, the locking grooves 133 are provided at the volume control grooves 131 with a predetermined gap therebetween in plurality in a volume control direction of the ice bank 100. And, the locking protrusions 134 are formed at the volume control protrusions 132.

However, the positions of the locking grooves 133 and the locking protrusions 134 may be interchanged to each other.

The locking grooves 133 are formed on either inner surfaces of the volume control grooves 131, or both side surfaces of the volume control grooves 131. And, the locking grooves 133 are formed so as to be opened in a direction that the ice bank 100 is drawn out.

The locking protrusions 134 are formed on side surfaces of the volume control protrusions 132 in correspondence to the locking grooves 133.

The locking protrusions 134 are formed so as to be elastically supported in a direction perpendicular to a volume control direction of the ice bank 100.

In the present invention, the locking protrusions 134 are implemented as plate springs supported by inner side walls of the volume control protrusions 132. However, the locking protrusions 134 may be configured so as to be supported by compression springs, etc.

The locking groove 133 is formed such that inner side surfaces thereof are inclined in a volume control direction of the ice bank 100. The reason is in order to guide motion of the locking protrusions 134.

Accordingly, an upper side of the locking grooves 133 is upward slantly formed toward an upper surface of the volume expansion container 120, whereas a lower side of the locking grooves 133 is downward slantly formed toward a lower surface of the volume expansion container 120.

Hereinafter, will be explained processed for drawing the ice bank 100 out of the storage space 15 s in the refrigerator according to the first embodiment of the present invention.

FIGS. 7 to 9 are views showing processes for drawing the ice bank out, and for controlling a volume of the ice bank in the refrigerator according to the first embodiment of the present invention.

Referring to FIG. 7, in order to use ice pieces stored in the ice storage space 100 s of the ice bank 100, the home bar door 15 b of the home bar 15 is opened to open the opening 15 c. Then, the ice bank 100 is pulled out of the storage space 15 s of the home bar housing 15 a, i.e., in a drawing direction.

Here, the second guide portion 150 having the ice bank 100 mounted thereto is also moved in the drawing direction by friction to the ice bank 100. The ice bank 100 and the second guide portion 150 are moved under guide of the guide protrusion 151 of the second guide portion 150, and the guide slot 141 of the first guide portion 140.

More concretely, the second guide portion 150 is horizontally moved in a drawing direction, then is downward slantly moved, and then is horizontally moved, again. Accordingly, even if ice pieces excessively stored in the ice storage space 100 s of the ice bank 100 are partially protruding toward an upper side, the ice bank 100 can be drawn out without interfering with the freezing chamber door 11 a.

When the guide protrusions 151 are located at front ends of the guide slots 141, the second guide portion 150 is not moved any longer in the drawing direction.

As shown in FIG. 9, when the ice bank 100 is continuously pulled in the drawing direction, only the ice bank 100 is moved in the drawing direction to be drawn out of the storage space 15 s of the home bar housing 15 a through the opening 15 c.

Here, the ice bank 100 is moved in the drawing direction until the interworking protrusions 113 are adhered to rear ends of the interworking ribs 154 of the second guide portion 150. In a state that the interworking protrusions 113 are adhered to the rear ends of the interworking ribs 154, only a part of a front end of the ice bank 100 is drawn out of the storage space 15 s of the home bar housing 15 a through the opening 15 c.

Under this state, the ice bank 100 is moved so that its front end is upward slanted in the drawing direction. This causes the ice bank 100 to be detached from the second guide portion 150, and to be completely drawn out of the storage space 15 s of the home bar housing 15 a. Here, the inclined portions 111 serve to prevent the ice bank 100 from interfering with the second guide portion 150 when being separated from the second guide portion 150.

Hereinafter, a refrigerator according to a second embodiment of the present invention will be explained in more detail with reference to the attached drawings. Detailed explanations for the same structures as those of the first embodiment will be omitted.

FIG. 10 is an exploded perspective view showing an ice bank and a second guide portion according to a second embodiment of the present invention.

The refrigerator according to the second embodiment is the same as that according to the first embodiment, except for locking unit 233 and 234 of a volume control unit 230.

The volume control unit 230 includes volume control grooves 231 formed at one of inner side surfaces of a body portion 210 and outer side surfaces of a volume expansion container 220; volume control protrusions 232 formed at another of the inner side surfaces of the body portion 210 and the outer side surfaces of the volume expansion container 220; and a locking unit 233 and 234 for restricting a relative motion of the volume control grooves 231 and the volume control protrusions 232 step by step.

The volume control grooves 231 are formed at outer side surfaces of the volume expansion container 220 in a consecutive manner from an upper end to a lower end of the volume expansion container 220. That is, the volume control grooves 231 are formed in a volume control direction of the ice bank 200.

The volume control grooves 231 are formed as parts of both side surfaces of the volume expansion container 220 are inwardly curved.

The volume control protrusions 232 are formed at the inner side surfaces of the body portion 210 in correspondence to the volume control grooves 231.

In order to maximize a volume of the ice bank 200, the volume control protrusions 232 are preferably formed at lower ends of the inner side surfaces of the body portion 210.

The locking unit includes locking grooves 233 formed at one of the volume control grooves 231 and the volume control protrusions 232 with a sectional surface of a sine wave in a volume control direction of the ice bank 200, and locking protrusions 234 formed at another of the volume control grooves 231 and the volume control protrusions 232 with a sectional surface of a sine wave.

In the present invention, the locking grooves 233 are consecutively formed in upper and lower directions of the volume expansion container 220. This allows a volume of the ice bank 200 to be variably controlled.

The locking protrusions 234 are provided in plurality in number in correspondence to the locking grooves 233 formed in consecutive sine waves. This allows a coupling force between the body portion 210 and the volume expansion container 220 to be increased.

Like in the first embodiment, the locking protrusions 234 are preferably formed so as to be elastically supported in a direction perpendicular to a volume control direction of the ice bank 200.

Hereinafter, a refrigerator according to a third embodiment of the present invention will be explained in more detail with reference to the attached drawings. Detailed explanations for the same structures as those of the first embodiment will be omitted.

FIG. 11 is an exploded perspective view showing an ice bank and a second guide portion according to a third embodiment of the present invention.

Referring to FIG. 11, the volume control unit 330 includes a first controller 331 formed at one of inner side surfaces of a body portion 310 and outer side surfaces of a volume expansion container 320, and having a sectional surface of a sine wave in a volume control direction of the ice bank 300; and a second controller 332 formed at another of the inner side surfaces of the body portion 310 and the outer side surfaces of the volume expansion container 320 so as to be engaged with the first controller 331, and having a sectional surface of a sine wave in the volume control direction of the ice bank 300.

The volume control unit 330 is formed at the inner side surface of the body portion 310, and the outer side surface of the volume expansion container 320 corresponding to each other. The volume control unit 330 is formed to have a sectional surface of a sine wave in a volume control direction of the ice bank 300.

As the first controller 331 and the second controller 332 are engaged with each other, the body portion 310 and the volume expansion container 320 are coupled to each other, and the body portion 310 and the volume expansion container 320 perform a relative motion with respect to each other along the sectional surfaces of a sine wave.

For the relative motion of the body portion 310 and the volume expansion container 320 with respect to each other, a predetermined air gap is preferably formed between the inner side surfaces of the body portion 310 and the outer side surfaces of the volume expansion container 320.

Hereinafter, a refrigerator according to a fourth embodiment of the present invention will be explained in more detail with reference to the attached drawings. Detailed explanations for the same structures as those of the first embodiment will be omitted.

FIG. 12 is an exploded perspective view showing an ice bank and the second guide portion according to a fourth embodiment of the present invention.

Referring to FIG. 12, a volume control unit 430 may be implemented as the volume control unit according to the first embodiment or the second embodiment.

The volume control unit 430 includes volume control grooves 431 formed at one of inner side surfaces of a body portion 410 and outer side surfaces of a volume expansion container 420, volume control protrusions 432 formed at another of the inner side surfaces of the body portion 410 and the outer side surfaces of the volume expansion container 420, and a locking unit 433 and 434 for restricting a relative motion of the volume control grooves 431 and the volume control protrusions 432 step by step.

Referring to FIG. 12, guide ribs 435 are formed at the inner side surfaces of the body portion 410 in a volume control direction of the ice bank 400. And, guide grooves 436 for guiding the guide ribs 435 are formed at the outer side surfaces of the volume expansion container 420.

The reason is, in order to prevent a phenomenon that the volume control protrusions 432 are fitted into the volume control grooves 431 not to be moved due to a motion between the body portion 410 and the volume expansion container 420, in the case that an inner surface of the body portion 410 is spacing from an outer surface of the volume expansion container 420 due to a tolerance, etc. when a volume of the ice bank 400 is to be changed.

It will also be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention cover modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents. 

1. A refrigerator, comprising: an opening disposed at one side of a door; an ice bank disposed on a rear surface of the door, and configured to be drawn out through the opening, for storing ice pieces; a guide unit for guiding the ice bank to be drawn out; and a volume control unit for changing a volume of the ice bank step by step.
 2. The refrigerator of claim 1, wherein the ice bank comprises: a body portion formed in a box shape having opened upper and lower surfaces; and a volume expansion container inserted into the body portion so as to be vertically moveable along an inner surface of the body portion, and forming an ice storage space having an opened upper surface.
 3. The refrigerator of claim 2, wherein the ice bank is provided with a handgrip concaved at a lower front end of the volume expansion container by a predetermined height toward a rear surface of the volume expansion container, and formed between a front surface of the body portion and a front surface of the volume expansion container.
 4. The refrigerator of claim 2, wherein the volume control unit controls a volume of the ice bank by restricting a motion of the volume expansion container with respect to the body portion step by step.
 5. The refrigerator of claim 2, wherein the volume control unit comprises: volume control grooves formed, in a volume control direction of the ice bank, at one of inner side surfaces of the body portion and outer side surfaces of the volume expansion container; volume control protrusions formed at another of the inner side surfaces of the body portion and the outer side surfaces of the volume expansion container in correspondence to the volume control grooves; and a locking unit for restricting a relative motion of the volume control grooves with respect to the volume control protrusions step by step.
 6. The refrigerator of claim 5, wherein the locking unit comprises: locking grooves formed at one of the volume control grooves and the volume control protrusions in a volume control direction of the ice bank; and locking protrusions formed at another of the volume control grooves and the volume control protrusions, and locked by the locking grooves step by step.
 7. The refrigerator of claim 6, wherein the locking groove is formed at one surface of both side surfaces of the volume control groove so as to be opened in a direction that the ice bank is drawn out, and wherein the locking protrusion is provided at a side surface of the volume control protrusion in correspondence to the locking groove.
 8. The refrigerator of claim 6, wherein the locking protrusion is formed so as to be elastically supported in a direction perpendicular to the volume control direction of the ice bank.
 9. The refrigerator of claim 6, wherein the locking groove is formed such that its inner side surfaces are inclined in the volume control direction of the ice bank.
 10. The refrigerator of claim 5, wherein the locking unit comprises: locking grooves formed at one of the volume control grooves and the volume control protrusions, and having a sectional surface of a sine wave in a volume control direction of the ice bank; and locking protrusions formed at another of the volume control grooves and the volume control protrusions in correspondence to the locking grooves.
 11. The refrigerator of claim 10, wherein the locking groove is formed at one surface of both side surfaces of the volume control groove so as to be opened in a direction that the ice bank is drawn out, and wherein the locking protrusion is provided at a side surface of the volume control protrusion in correspondence to the locking groove.
 12. The refrigerator of claim 10, wherein the locking protrusion is formed so as to be elastically supported in a direction perpendicular to the volume control direction of the ice bank.
 13. The refrigerator of claim 2, wherein the volume control unit comprises: a first controller formed at one of inner side surfaces of the body portion and outer side surfaces of the volume expansion container, and having a sectional surface of a sine wave in a volume control direction of the ice bank; and a second controller formed at another of the inner side surfaces of the body portion and the outer side surfaces of the volume expansion container so as to be engaged with the first controller, and having a sectional surface of a sine wave in the volume control direction of the ice bank.
 14. The refrigerator of claim 2, wherein the guide unit comprises: a first guide portion fixed in the opening, for guiding the ice bank to downward slantly move toward the opening; and a second guide portion configured to be drawn out of the opening under guide of the first guide portion, for mounting the ice bank in a drawing manner.
 15. The refrigerator of claim 14, wherein one pair of guide protrusions formed at one of outer side surfaces of the second guide portion and inner side surfaces of the first guide portion perform a sliding motion in an inserted state into one pair of guide slots formed at another of the outer side surfaces of the second guide portion and the inner side surfaces of the first guide portion.
 16. The refrigerator of claim 14, wherein the second guide portion is formed in a hexahedron shape of which upper, lower, and front surfaces are opened in correspondence to the body portion, and wherein the second guide portion guides the ice bank to be introduced into or drawn out of the opening.
 17. The refrigerator of claim 14, wherein the second guide portion comprises: supporting portions extending from lower ends of both side surfaces of the second guide portion in a thickness direction of both side surfaces of the body portion, for supporting the ice bank; and one pair of interworking ribs formed at upper front ends of both side surfaces of the second guide portion, and extending from both side surfaces of the body portion in a thickness direction, wherein one pair of interworking protrusions are formed at upper rear ends of both side surfaces of the body portion, such that the second guide portion is drawn out by interworking therewith when the ice bank is drawn out.
 18. The refrigerator of claim 2, wherein lower rear ends of both side surfaces of the body portion are formed to be downward slanted in a direction that the ice bank is drawn out. 